Ask
your own question, for FREE!
Mathematics
31 Online
Find a six-digit number whose first three are 637 and that is divisible by 21,23, and 24.
Still Need Help?
Join the QuestionCove community and study together with friends!
If it's divisible by 21, 23, and 24, you can start by multiplying those together: 21 * 23 * 24 = 11592 Then you can multiply that by numbers until you're in the right realm. In this case, it's a number starting with 11, and you need it to start with 637. If you divide 637/11 you get 57.909 or so, so you have a starting point: let's multiply 11592 by 56. That gives us 649152, which is slightly higher than we want it. If we multiply by 55, we get 637560. So: 21 * 23 * 24 * 55 = 637560 We know it's divisible by the three numbers, because they were multiplied in to produce the number, and this number starts with 637. Eureka!
Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!
Join our real-time social learning platform and learn together with your friends!
Join our real-time social learning platform and learn together with your friends!
Latest Questions
Ferrari:
Hi, this is something I wrote last year as a freshman. "My first regular-length song, by Rari.
curriful:
small doodles, tell me what you think and if theres anything i can do better.
Breathless:
Finally- I finished! this one is really going to be my favorite
gelphielvr:
(algebra 1) not looking for the answer. Does anyone know if this question is aski
Yosad930:
okay another random question that even google itself isnt helping me with: why cant i zoom in and out anymore with the touchpad? yk how when you pinch your
AddieroniAndCheese:
Tips for studying for an AP exam in like a week? I barely know anything about chem T-T.
thereneelg:
Ok so. I need help. So for one of my songs in choir, The Power of Love. We have to hold one of the "Love"s for a long time.
4 hours ago
7 Replies
2 Medals
2 hours ago
12 Replies
1 Medal
2 hours ago
12 Replies
0 Medals
1 day ago
7 Replies
1 Medal
1 day ago
10 Replies
1 Medal
1 day ago
5 Replies
1 Medal
6 hours ago
14 Replies
2 Medals